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J. TEIIMA AND K. KISHIDA. APPARATUS FOR EXCLUDING DENSE FOG.

APPLICATION FILED mm! 26. 1911. 1,312,23 Patented Aug. 5,1919. 2 SHEETS-SHEET I.

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J. TEJIMA AND K. KISHIDA.

APPARATUS ron EXCLUDING DENSE FOG.

APPLICATION FILED JULY26| I911- Patented Aug. 5, 1919.

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UNITED STATES PATENT oEEIcE.

JUKICHI 'IEJIMA, OF UBE, AND KEISUKE KISHIDA, OF TOYOHIGASHI, YAMAGUCHI,

JAPAN.

APPARATUS FOR EXCLUDING DENSE FOG.

Specification of Letters Patent.

Patented Aug. 5, 1919.

Application filed July 26, 1917. Serial No. 183,011.

To all whom it may concern:

Be it known that we, JUKicHI TEJIMA and KEIS KE KISHIDA, subjects of the Emperor of Japan, residing, respectively, at No.

62 Nishi-shin-kawakamimachi, Ube Village, Asa District, Yamaguchi Prefecture, Japan, and No. 857 Tabe, Toyohigashi Village, Toyoura District, Yamaguchi Prefecture, Japan, have invented certain new and useful Improvements in Apparatus for Excluding Dense Fog, of which the following is a specification.

This invention relates to a sighting instrument which is adapted to be mounted upon a ship or the like and embodies novel features of construction whereby a fog can be excluded from the line of sight, thereby enabling the operator to look clearly through a dense fog and avoid the danger of collision, stranding or the like.

In the accompanying drawings:

Figure 1 is a side elevation of a sighting apparatus constructed in accordance with the invention.

Fig. 2 is a rear elevation of the same. Flg. 3 is a vertical sectional view on the line 3-3 of Fi 2.

Specifically describing the present embodiment of the invention, the numeral 1 designates an outer tubular casing or shell,

and 16 an inner tube which extends longitudinally through the outer tube and is s aced therefrom, suitable means such as 7 that indicated at 6 being employed to hold the outer and inner tubes in a spaced relation. The forward ends of the tubes 1 and 16 are open, while the rear end of the outer tube 1 is tapered and provided with a peeping glass 3 which is attached to the tube by a hinge 13. The rear end of the inner tube 16 entends into contact with the rear end of the outer tube 1, and the peeping glass 3 is arranged for looking through the inner tube. A comparatively small annular space 7 is provided between the forward ends of the tubes 1 and 16, said space communicating with a larger space 2 between the tapered rear end of the inner tube 16 and the outer tube 1.

A hinge member 5 is attached to the outer tube 1 and rigidly engaged by a pin 11 which is pivotally mounted upon the upper end of the standard 9. A segmental plate 4 is rigid with the pin 11 an engaged by a clamp controlled by a handle 17. When the handle 17 is manipulated to release the segmental plate the tube 1 can be rotated about a horizontal axis into different angular positlons, being locked in an adjusted position by again manipulating the handle 17 to clamp the segmental plate 4.

The standard 9 is provided with an elbow pipe 10 of which one arm opens through the bottom thereof and has a swivel connection with the upper end of an elbow pipe 8 which is mounted upon the base 8. Screws 14 which are fitted in the elbow pipe 10 engage a groove 15 in the upper end of the elbow pipe 8, to prevent the two elbow pipes from pulling apart, although a swivel connection is maintained which enables the standard 9 together with the tubes mounted thereon to be freely rotated about a vertical axis. The sighting tube 16 can thus be adjusted to direct the line of sight toward 76 any desired object. A feed pipe 20 which may ommunicate with any suitable source of compressed air supply is connected to the lower arm of the elbow pipe 8, while a flexible air pi e 18 which is made of suitable 80 material esta lishes communication between the upper end of the elbow pipe 10 and the air chamber 2 in the rear end of the tube 1 the said rear end of the tube being forme with an inlet opening surrounded by an outstanding flange 12 to which the end of the flexibletube 18 is attached.

When the device is in operation compressed air will enter the air chamber 2 at the rear end of the outer tube 1 and will leave this chamber 2 through the comparatively small annular space 7. In passing through this small annular space 7 the air will attain a considerable velocity so as to be ejected from the forward end of the tube in a tubular jet or stream which surrounds the line of sight. This tubular jet of air will exclude a heavy fog from the line of sight so that the operator can look forward through the fog and avoid the danger of collision, strandlng and the like when the device is mounted upon a ship.

Having thus described our said invention, what we claim and desire to secure by Letters Patent is: 1

1. In an apparatus of the character described, the combination with a sighting tube, a standard upon which the sighting tube is adjustably mounted, nozzle means mounted upon the sighting tube and ar- 110 ranged to eject a tubular stream of compressed air from the forward end of the sighting tube, said tubular stream surrounding the line of sight so as to exclude fog therefrom, a compressed air pipe in the standard and a flexible tube connecting the compressed air pipe of the standard to the nozzle of the sighting tube.

2. In a device of the character described the combination with a sighting tube, a standard upon which the sighting tube is adjustably mounted, an outer tube surrounding the sighting tube and spaced therefrom to provide an annular chamber which is 15 mounted at the forward end of the sighting tube, a compressed air pipe in the standard, and a flexible tube connecting the com- #5. pressed air pipe to the chamber of the outer JUKICHI TEJIMA. [L.s.] KEIS'UKE KISHIDA. [1,. 8.

Witnesses DAIJNO Ism, KOICHI IRIN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0. 

